<!DOCTYPE html>
<html>
<head>
  <title>Test for bug 806583</title>
  <style>
    body, div { background: blue }
    div { position: fixed; }
  </style>
</head>
<body>
  <input id="input">
  <div id="cover"/>
  <script>
var rect = document.getElementById("input").getBoundingClientRect();
var cover = document.getElementById("cover");
cover.style.left = rect.left + "px";
cover.style.top = rect.top + "px";
cover.style.width = rect.width + "px";
cover.style.height = rect.height + "px";
  </script>
</body>
</html>
